#!/bin/bash  
  
# Simple print cpu topology  
# Author: kodango  
  
function get_nr_processor()  
{  
    grep '^processor' /proc/cpuinfo | wc -l  
}  
  
function get_nr_socket()  
{  
    grep 'physical id' /proc/cpuinfo | awk -F: '{  
            print $2 | "sort -un"}' | wc -l  
}  
  
function get_nr_siblings()  
{  
    grep 'siblings' /proc/cpuinfo | awk -F: '{  
            print $2 | "sort -un"}'  
}  
  
function get_nr_cores_of_socket()  
{  
    grep 'cpu cores' /proc/cpuinfo | awk -F: '{  
            print $2 | "sort -un"}'  
}  
  
echo '===== CPU Topology Table ====='  
echo  
  
echo '+--------------+---------+-----------+'  
echo '| Processor ID | Core ID | Socket ID |'  
echo '+--------------+---------+-----------+'  
  
while read line; do  
    if [ -z "$line" ]; then  
        printf '| %-12s | %-7s | %-9s |\n' $p_id $c_id $s_id  
        echo '+--------------+---------+-----------+'  
        continue  
    fi  
  
    if echo "$line" | grep -q "^processor"; then  
        p_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`   
    fi  
  
    if echo "$line" | grep -q "^core id"; then  
        c_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`   
    fi  
  
    if echo "$line" | grep -q "^physical id"; then  
        s_id=`echo "$line" | awk -F: '{print $2}' | tr -d ' '`   
    fi  
done < /proc/cpuinfo  
  
echo  
  
awk -F: '{   
    if ($1 ~ /processor/) {  
        gsub(/ /,"",$2);  
        p_id=$2;  
    } else if ($1 ~ /physical id/){  
        gsub(/ /,"",$2);  
        s_id=$2;  
        arr[s_id]=arr[s_id] " " p_id  
    }  
}   
  
END{  
    for (i in arr)   
        printf "Socket %s:%s\n", i, arr[i];  
}' /proc/cpuinfo  
  
echo  
echo '===== CPU Info Summary ====='  
echo  
  
nr_processor=`get_nr_processor`  
echo "Logical processors: $nr_processor"  
  
nr_socket=`get_nr_socket`  
echo "Physical socket: $nr_socket"  
  
nr_siblings=`get_nr_siblings`  
echo "Siblings in one socket: $nr_siblings"  
  
nr_cores=`get_nr_cores_of_socket`  
echo "Cores in one socket: $nr_cores"  
  
let nr_cores*=nr_socket  
echo "Cores in total: $nr_cores"  
  
if [ "$nr_cores" = "$nr_processor" ]; then  
    echo "Hyper-Threading: off"  
else  
    echo "Hyper-Threading: on"  
fi  
  
echo  
echo '===== END ====='
